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5. Press
[ CH / + ]
key or
[ MEM / - ]
key to change the value.
6. Press the
[ BARO ]
key to save and exit the setting mode.
TO SELECT THE MEASUREMENT UNIT FOR THE BAROMETER
Use the
[ BARO ]
key to change the unit between
hPa / inHg / mmHg
NOTE:
- When power up the main unit, it will display the relative pressure reading and default
value is 1013 mb/hPa (29.91 inHg), which refers to the average atmosphere pressure.
- When you change the relative atmospheric pressure value, the weather indicators will
change along with it.
- The relative atmosphere pressure is based on the sea level, but it will change with the
absolute atmosphere pressure changes after operating the clock for 1 hour.
HEAT INDEX / DEW POINT
TO VIEW HEAT INDEX
Press the [ INDEX ] key repeatedly to show HEAT INDEX
value.
NOTE:
Heat index is only calculated when temperature is 27° C (80° F) or above, and based
solely from the temperature and humidity measured from the outdoor wireless sensors.
TO VIEW DEW POINT
Press the [ INDEX ] key repeatedly to show DEW POINT
value.
NOTE:
The dew point is the temperature below which the water vapor in air at constant
barometric pressure condenses into liquid water at the same rate at which it evaporates.
The condensed water is called dew when it forms on a solid surface. The dew point
temperature is calculated from the outdoor temperature and humidity measured at the
outdoor wireless sensors.
Summary of Contents for YC9481
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